English

grandmaternity

From grand- + maternity.

Middle English

Proto-Indo-European *méh₂tēr ‘mother’

…

Latin māter ‘mother’

Latin māternus ‘of or pertaining to a mother, maternal’

Latin māternitās

French maternité

Today it means

noun The state or quality of being a grandmother.

Language periods are conventional ranges, not dates for this word.

Etymograph / grandmaternity